In the hollow Mysterious Planet, seven kingdoms co-exist, all of them lit by the Sun's Blessing from the Kingdom of the Sun, in the middle of the planet. The light of the core sun is necessary for the continued existence of all the kingdoms. Yet, something is causing the Sun's Blessing to weaken. If something isn't done, it will be the end of life in the Mysterious Planet. Fortunately, the twin princesses of the Sun Kingdom, Fine and Rain, have been endowed with the magic of the Prominence, and are looking for a way to fix things.
Fine: Voiced by: Megumi Kojima
Fine is the one of the twin princesses of Sunny Kingdom. She has red eyes and reddish-pink hair. Fine is referred to as one of "the most unprincess-like princesses in the history of Fushigi-boshi.Fine is very athletic.Just like her sister, Rein, she dont know how to dance.Nevertheless, she is friendly, kind, and cares about the people she loves (including Shade). She was the first one to find out that Eclipse (Shade) wasn't as bad as everyone thought he was (which soon leads her to fall in love with him).
Rein:Voiced by: Yuko Goto
Rein is the second protagonist of the series and the other twin princess of Sunny Kingdom. She may look identical to her sister, Fine, but her eyes are blue and her hair is blue. Rein is also referred to as one of "the most unprincess-like princesses in the history of Fushigi-boshi", but unlike Fine, she is likes to dress up and wear elaborate decorations. Rein gets crazy when it comes to romance and always end Bright's name with "sama". She's adventurous, but as friendly, eccentric and caring as Fine. Her name was originally spelled with an "a" in English, but the director, Junichi Sato, doesn't want her name to be related to the weather "rain". Instead of Shade, she's more focused on Bright.
Poomo: Voiced by: Satomi Koorogi
Poomo is a fairy-like creature given to the twins from Princess Grace. He has a supernatural ability called Telepoomotion that transports Fine and Rein to any place in the Wonder Planet. Fine and Rein uses him as their maid to do their housework. Usually, he ends his sentences with "-pumo". Poomo cares a lot about Fine and Rein.
Princess Grace: Voiced by: Yuko Minaguchi
Grace is the legendary princess who once saved Fushigi-boshi in the ancient days. Although she died ages ago, she appears as an astral body inside the core of the Sun's blessing before she entrusts Fine and Rein in a mission to save the planet.
Camelot: Voiced by: Kazuko Sugiyama
Camelot is one of Fine and Rein's maid. She can be very bossy in the beginning of the series, but has a caring and enthusiastic side to educate Fine and Rein to become more proper and decent princesses.
Lulu:Voiced by: Misato Suzuki
Lulu is Camelot's cat-like trainee. She gives suggestions to Camelot in some cases and jots down comprehensive notes of Camelot's work.
Elsa: Voiced by: Ayako Kawasumi
Elsa is the queen of Sunny Kingdom and Fine and Rein's mother. She has a gentle and kind character. Fine and Rein admire her mostly because of the precious decors she made. Her hair is pink and her eyes are red just like Fine.
Voiced by: Wataru Hatano
Truth: Voiced by: Wataru Hatano
Truth is the king of Sunny Kingdom and Fine and Rein's father. He has sea green eyes and blue hair just like Rein.
Omendo: Voiced by: Isamu Tanonaka
Omendo is the laboratory scientist of Sunny Kingdom. He analyzes all of the climate data that are processed by the weather stations.
Tabi and Jill: Voiced by: Yuuki Tai (Tabi), Masayo Kurata (Jill)
Tabi and Jill are some of the workers of the weather station.In episode 4 rein and fine help Tabby out because he is overworking, and jill is very worried about him.
Milky:Voiced by: Kazuko Kojima
Milky is the princess of the Moon Kingdom and Shade's younger sister. She's a toddler that can travel around places (by sitting on her floating star). Milky is more likely to have trouble communicating people with her "Babu" babbling, but people like Shade and Fine can understand what she means.
Shade:Voiced by: Junko Minagawa
Shade is the prince of the Moon Kingdom and Milky's older brother. He appears as Eclipse during the beginning of the series. His whip attacks are identified the same as Eclipse. Whenever Shade goes out, he normally dresses up as Eclipse. Later in the series, he realized that he is in love Fine. He's obsessed in the power of the Prominence. Shade may belong to the tsundere family, but the twins (Fine and Rein) discover that his true character is actually a caring person. Shade wants to become a doctor so that he could take care of his sickly mother, Moon Maria/Malia.
Regina: Regina is Shade's pet dragon. She was given to Shade when he was 5 years old.
Moon Maria/Malia :Voiced by: Keiko Han
Moon Maria/Malia is the queen of the Moon Kingdom and Shade and Milky's mother. Her mood and health is measured by the aurora waves floating in the sky. She is usually sick.
Chuuba: Voiced by: Kiri Yoshizawa
Chuuba is a very accurate rat fortune teller.
Monmon Golem:
Monmon Golem is the beast that sleeps deep inside the temple. At certain times of the year, he wakes up and blows the obscuring clouds away from the moon to allow moonlight into the Moon Kingdom.
Queen Scorpion
Queen Scorpion is a very big scorpion that comes only when her little scorpions get defeated. She is very sensitive to loud noises.
Mia:Voiced by: Rina Satou
Mia is a local worker near the Star Lake.
Lione:Voiced by: Misato Fukuen
Lione is the princess of the Flame Kingdom and Tio's older sister. She is too personal and often takes thoughts too deeply. Also, Lione is not very fond of dancing, but she is the first person Fine and Rein became friends with. She even knows how to cheer Tio up. Lione is very good at Samba dancing. It is shown that she did Samba dancing for the first time at the annual Samba party in the Flame Kingdom in episode 32. Lione has some useful skills like driving and being able to tell how Bo Dragon is feeling.
Tio:Voiced by: Vanilla Yamazaki (Episodes 1 - 26), Shihomi Mizowaki (Episodes 27 - 51)
Tio is the prince of the Flame Kingdom and Lione's younger brother. He likes to play with his katana (saber) and do ninja. Tio often makes useless actions because he always crashes whenever he tries to save Fine and Rein from trouble. He sees Shade as his hero.
Wohl:
Wohl is the king of the Flame Kingdom and Lione and Tio's father. He is very dynamic and his excitement is emphasized by the torches in the throne room.
Nina:Voiced by: Yukie Maeda
Nina is the queen of the Flame Kingdom and Lione and Tio's mother.
Howan: Voiced by: Kenta Miyake
Howan is a cook and a manager of a Chinese-style restaurant in the Flame Kingdom. The special‐feature menu of his restaurant is Flaming Hot Fried Rice (Heramera Chaofan).
Bo Dragon:Voiced by: Keniji Hirai
Bo Dragon is an extremely large dragon living inside the volcano. When Bo Dragon is sick, he coughs volcanic ashes.
Flame dog:
Flame Dog is creature with two flame tails. When Shade rides on Regina, Tio rides on him. He is sometimes incompetent with Tio. Flame Dog's best appetite is Poomo.
Mirio: Voiced by: Sachi Sukigara
Mirio is the princess of the Water Drop Kingdom and Narlo's older sister. Just like Lione, she is also personal. Mirio is very artistic and makes excellent paintings. She takes care of Narlo very well.
Narlo:Voiced by: Haruhi Terada
Narlo is the prince of the Water Drop Kingdom and Mirlo's baby brother. He is about the same age as Milky. His infamous way to call his mom is "Gabin!!" ("Gabin" means "Oh my GOD!" in Japanese.) Nalro seems to have a crush on Milky.
Yamul:
Voiced by: Mahiru Konno
Yamul is the queen of the Water Drop Kingdom and Mirlo and Nalro's mother. She is very strict and firm about Mirlo to behave like a proper princess by ordering her to follow everything she says.
Ida and Ada:
Voiced by: Aiko (Ada), Yuko (Ida)
Ada and Ida are the two villagers of the Water Drop Kingdom. They take care of the birds deeply and will do anything to obtain food for the birds (including to pose as Fine and Rein).
Esteban:
Esteban is the boy that Mirlo was supposed to marry. He is kind to her though. Being younger than Mirlo, Esteban does not even understand what marriage is. He also drives a small car.
pearl:Voiced by Rumi Shishido
Pearl is the princess of the unknown country, Sea Kingdom. She lives with her friends, but not her parents. Her parents rarely visit her because they attend government affairs. However, they love her as much as she does.
